Variable-speed mechanism.



A. L. DE LEEUW. VARIABLE SPEED MECHANISM. APPLICATION FILED JUNI: 24. 1907.

Patented Dec. 1, 1908.

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A. L. DE LEEUW. VARIABLE SPEED MEGHANISM. APPLICATION FILED JUNE 24, 1907.

2 SHEETS-SHEET 2.

Patented Deo. 1, 1908.

ADOLPH DE LEEUW,

OF HAMILTON, OHIO, ASSIGNOR TO THE CINCINNATI MILLING MACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION.

VARIABLE-,SPEED MECHANISM.

, Application led .T une 24,

To all 'whom it 'm0/y concern:`

Be it known that I, ADoLPH L. DE LEEUW, a citizen of the United States, residing at Hamilton, in the county of Butler and State of Ohio, have` invented certain new and useful Improvements in Variable-Speed Mechanism, of which the following is a speciy 4 fication.

My inventionrelatesto a variable speed mechanism primarily of the cone and tumbler type.

One of the objects of my invention is to provide means for securely locking the tumbler frame in anyposition of transmission, forming a rigid support for the tumbler gear.

Another object of'my invention is to provide means whereby the tumbler frame can hey moved. longitudinally and laterally' by the' samev lever or handv wheel as the case may be. i

Another object of my invention is to provide means whereby the mechanismfor shift` ing the tumbler gear laterally into mesh with one locks the tumbler frame rigidly to such adjusted position.

Another object of my invention is to so mount and support the tumbler-that it transmits no strains to the shaft relative to which it slides.

The features of my invention are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which j Figure 1 is a side elevation ofthe tumbler mechanism and cone with its supportingv frame shojvvnin section. Fig. 2 is a section on line w, w, Fig. 1. Fig. 3 is a central vertical section through the tumbler frame. Fig. 4 is a section on line w, fw, Fig. 2. Fig. 5 is an enlarged section on line y, y, Fig. 6,

f through the hand wheel and casing adjacent. Fig. 6 is a front elevation of the hand wheel and tumbler frame.

1 represents the mainframe of the machine within which is journaled a transmission shaft 2, carrying a cone of different diameter gears 3. The frame 1, as shown in the drawings, is provided with an openin over which the tumbler frame 4 is secure and within which frame the driving shaft and tumbler mechanism is mounted.

The principle of the construction shown Specification of Letters Patent.

of the gears of the cone, likewise Patented Dec. 1, 1908.

1907. seria1N.sso,s2s.

:is applicable to any machine in which a i varying speed is desired. Again, I have l termed the shaft upon which the tumbler and the shaft 2 carrying the cone of gears as the driven shaft, but the relations of theseshafts may be reversed.

5 represents the driving shaft journaled Withm the frame 4, and 6 represents a pulley fixed to the free end of said shaft for imparting. rotationthercto.

7 represents a slide-way formed in the casing 4, within which slide, plate 8 is mounted and adapted to be moved longitudinally.

9. represents a bracket projection formed integral with the slide plate 8,- and project# ying downwardly', through whehthe driving sh'aft' andtumble'rframe actuating sleeves pass and' are supported.

10 represents an actuating shaft, journaled in the bracket projection 9,and projecting forward through a slot 12, oblong in shape, formed in the frame 4.

13 represents a worm fixed to said shaft 10 and mounted directly above the driving shaft 5. Said'bracket projection is 'cut away to permit the worm 13 to be mounted directly above said shaft 5, and thereby form a bearing for the actua-ting shaft 10 upon each side of the worm.

14 represents a worm wheel loosely mountl ed upon the shaft 5, provided with a sleeve extension 15, adapted to be fixed within the sleeve extension 16 of the tumbler frame 17. Thus it will be seen that as the worm wheel is rotated it will move the tumbler frame laterally to and from the cone according to the rotation ,of the worm wheel. This rocking frame maybe generically regarded as a tumbler lever.

18 represents a sleeve projecting from the tumbler frame 17 fitting andv supported within a bracket 19 fixed to the slide plate 8, 'see Figs. 1 and 2'. This bracket 19 and the bracket projection w9, projectin from the slide plate opposite each other orm a very frame. mounted'in'a sliding'support, which support is Vgibloed tothe frame'4.

20 represents'a gear keyed to the shaft 5,

1 journaled upon the stud shaft 22, supported substantial journal support for the tumbler The' tumbler is therefore pivotally mechanism is mounted as the driving shaft,

but slidable thereon, in mesh with a gear 21 The hand wheel mesh with the gear 20 and' adapted to be Ybrought into selective engagement with any one of the gears forming a part of the cone 3.

From the construction 4heretofore described it will be seen that the tumbler frame and its actuating mechanism are mounted upon the slide plate 8, and that by moving said slide plate the tumbling gear is adjusted t0 selected position opposite to one of the gears of the cone, the tumbler proper can then lbe rocked on the sliding frame to bring the tumbling gear into or out of mesh with the cone. i i f .The following instrumentalities are employed for conveniently shifting the slide plate and its contained mechanism longitudinally; the same being likewise in part employed for rocking the tumbler. 23 represents a disk shaped plate loosely supported upon the actuating rod 10, provided with an oblong shaped boss 24, projecting into the slot 12 to prevent said disk plate 23 from turning. ,The opposite disk plate 23 is provided with a projecting boss over which the hub portion of the hand wheel 25 projects.

27 represents a spring controlled detent adapted to engaUe into the orifices `or notches 28 to indicate the positionof longitudinal shifting to place gear 21 into proper engaging relation with a selected gear of the cone. 25 is slidably keyed to the actuating shaft 10.

26 represents a. spring, one end of which l bears against the hand wheel 25, the opposite end against a collar 29 fixed to the free end of the actuating shaft 10, said collar being of a diameter to permit the same to-slide wthin a bore encircling the coiled spring 26, the function of which will be hereinafter described.

30 represents a boss projecting downwardly from the tumbler frame 17, adapted to engage with set nuts31 arranged in step form upon the frame 4, see Fig. 1, forming a lock or abutment in locking the tumbler frame in a driving position,|at the same time as the tumbler islocked against lateral movement it is also locked against longitudinal ymovement, which is accomplished as follows Assume that the slide plate 8, has been shifted to b'ring the tumbler gear 21 adjacent'to one of the gears of the cone, the hand wheel v'25 is then rotated, say to the right, which, as itis keyed to the actuating shaft 10 will causerotation of the worm 13, and then of the worm wheel 14, moving the tumbler frame, or its free end carrying the tumbler wheel 21, towards the cone of gears, and thisaction 1s continued until the lug 30 contacts with the set nut or ,ri id abut ment 31 YYwhence' aslight additiona rotation of the,'had wheel, through the powerful 17. Said gear 21 is constantly in 4 rock a To so as to bring the tumbler gear 21 to a second end or face of said,

-is in intermesh with the cone,

worm and worm wheel drive, will force the slide plate 8 against the slideway 7, preventing longitudinal movement of the slide plate and the compression engagement of the lug against the set nuts 31 preventing an f ing movement of the tumbler frame.

4release the tumbler frame and shift it position the hand wheel is rotated in the opposite direction releasing the clamping action on the tumbler frame against the rigid abutment and moving the tumbler gear away from the cone. The hand wheel is then lpulled outward agains /the tension of thev spring 26, which "action whi e slight will release the spring controlled detent pin 27 and disk plate 23, so that the slide plate 8 can 4be moved longitudinally to disengage the detent pin 27 from its engaged notch. The hand wheel thus controlled can easily be moved, either to the right or left, to a second of the series of notches, which would position the tumbler gear 21 properly. lf the'slide plate 8 is desired to be moved further thanone notch, the hand wheel is heldY in such outward position and moved longitudinally to carry the detent pin toits proper position for engagement with the selected notch. l i

From this description, the principle of the invention will be readily understood. The tumbler frame or lever is pivoted on a slid able support; when this lever is moved intov position of gear intermesh, it engages solidly against a rigid frame abutment, and it is held in this position by the clamping action ofthe mechanism between the tumbler and theframe. As a result, when the tumblerv is in the position of gear inter-mesh, it is clamped against the rigid abutment, land so becomes incorporated bodily into the frame structure. In this position the lever may be regarded assimply a gear support, the strains being entirely taken up by the frame work. The gear intermesh and the throw of the lever will always be accurate, there being no lost motion or wear which cannot be cornvpensated for at once.

In v--the preferred method of construction there is one rigid support for the tumbler frame and one rigid abutment against which the tumbler frame engages', the support and abutment occupying a position on each side of the fulcrum of the tumbler frame, the equivalent of engaging the tumbler frame on opposite edges thereof, so that the tumbler isrlgidly clamped between two rigid portions of the machine frame. .f

.It is obvious that when the tumbler gear the tumbler is clamped against a rigid and an immovable abutment forming part of the frame, thus regulating the depth of intermesh and holding the tumbler gear firmly in its position, without possibility of further rocking moveintermesh, and means for clam ment. A further tightening; of the hand4 point also the tumbler mechanism is clamped against a rigid abutment or a portion of the fixed frame, and further longitudinal movementof the slide piece isimpossible. The

tumbler does not fulcrumv ldirectly on the driving shaft but in the brackets projected from the sliding support, so that n o tumbler strains are imparted to the driving shaft or tumbler gears. The tumbler and its sliding ysupport are therefore both clamped against rigid frame abutments upon opposite sldes of the fulcrum of the tumbler lever. ,This makes a powerful tumbler mechanism, very simply manipulated and very durable.

Having described my invention, I claim 1. A gear, a tumbler and gear, an abutment for the tumbler in the position of gear ing the tumbler against said abutment, su stantially as described.

2. A cone and tumblergearsystem, a series of abutments correspondin to the positions of gear intermesh, an means for clamping the tumbler against the abutments, substantiall as described.

3. A series of different diameter gearl wheels, a tumbler frame and gear, means for sliding the frame, a series of rigid abutments, adapted to be engaged by the tumbler frame in the different positions of-geai` intermesh, and means for rocking the frame and clamping it against its abutments, sub-- stantially as describel 4. In a cone and tumbler variable speed gear system, a frame, a sliding tumbler support, a tumbler pivoted to the support, a

series of abutments adapted to be engaged* by the tumbler in its respectivek Ositigns of gear intermesh, and means for c amping'the tumbler against said abutments, substantially as described,

5. Inl a. cone and tumbler variable speed gear system, a frame, port, a tumbler pivoted tot e support, a series of ab itments adapted to be engaged by the tum| ler inits positions of gear 1nvte'rmesh, means for clampin the tumbler against said abutments, ino' said `sliding support against the frame, substantially as described.

6. In a variable speed device, first shaft, a cone of shaft, a slide-plate slldably mounted within the frame, a tumbler frame supported upon said slide-plate, said second sha projecting througlVsaidl tumbler frame, transmission gearing between the second shaft and first shaft, adapted to be controlled by said tumbler frame, worm and worm wheel connection with the 'tumbler frame for lateral adjustment thereof, and worm actuating and a frame, a

and a so for clamp- 4 slide plate shifting slide plate, whereb the tumbler frame can be actuated longitu inally and laterally, substantially as described.

. 7. In,a variablespeed device, a frame, a first shaft a second shaft, a cone of gears frame, intermediate transmission gearing 4controlled* by said tumbler frame for imparting motion f rlomsaid second shaft to a selsupport slidably mounted in said frame, and means for moving said tumbler frame support longitudinally andl said tumbler frame laterally, and lockln 'said parts in a selected position, substantialIy as described.

gear system, a frame, a sliding tumbler support, a tumbler pivoted to the support, and manipulating mechanism adapted to slide the support and rock the tumbler, substantiallyas described.

9'. In a cone and tumbler variable speed gear system, a frame, a tumbler shaft, a sliding tumbler support, a tumbler pivotedon shaft, a series of abutments formed on. the frame against which the tumbler engages .in its positions of gear intermesh, and manipulatingmechanis'm adapted to slide the suport, rock ltsabutments, substantially as described.

v10.. Ina cone and tumbler variable speed gear. system, a' frame, a tumbler shaft, a slidmg tumbler support, a tumbler pivoted on shaft, a -seriesof abutments formed on the frame against which the tumbler engages in its positlons of gear intermesh, and manipulating mechanism adapted to slide the support, rock the tumbler, clamp the tumbler against its abutments and clamp the` sliding sup ort against its slideway, substantially as escribed. Y

11. In combination with a tumbler and gear, a intermes es, a rigid abutment yfor the tumbler in the position of intermesh, and Worm mechanism adapted to rock said tumbler vand holdat by pressure against said abutment, substantially as described.

Iournaled in the frame, a tumb er support held by `the frame, a tumbler pivoted in said support concentric with said shaft, a pinion fixed. to said shaft, a tumbler gear engaging said pinion. an abutment for said tumbler in the position of gear intermesh, and -mechanism for rocking said tumbler on its support and clamping it against said abutment, substantially as described.

. 13. A frame, a series of gears to be engaged, a shaft journaled in the frame, a tumbler su port adapted to slide on the frame para lel with the gears to be engaged,

means carried by said 8. In a cone and tumbler variable speed said support coincidently to the tumblerV the tumbler and'clamp it against 12. A frame, a gear to be engaged, a shaft` mounted uporsaid first shaft, a tumbler lected gear/of the cone, a tumbler frame gear with which the tumbler gear i 10o' saidy support coincidently to the tumbler 1 a tumbler pivoted in said support concentric with the said shaft, a pinion fixed to said shaft, a tumbler gear engaging said pinion, a series of abutments adapted to be engaged by said tumbler in the positions of gear intermesh, and mechanism for sliding said support and locking the tumbler, adapted to clamp vthe tumbling and sliding devices against rigid frame abutments, substantially as described.

111. In a cone and tumbler variable speed gear device, a frame, a tumbler support adapted to slide on the frame, a tumbler pivoted to l' the said support, and Worm mechanism carried by the sliding support, adapted to rock said tumbler, substantially as described.

15. In a cone and tumbler variablespeed gear system, a frame, a tumbler support slidable on the frame, a tumbler pivoted to the said support, a series of rigid abutments adapted to be engaged by the tumbler When in its positions of gear intermesh, and Worin mechanism carried by the sliding support, adapted to rock the tumbler and clamp itagainst said abutments, substantially as described. y

16. In a cone and tumbler ear system, a frame, a tumbler support slidable on the frame, a tumbler pivotally mounted on the support, worm mechanism carried by the slidable sup ort, a hand Wheel outside of the frame or operating said Worm, and

means for pinning the hand Wheel to the frame, substantially as described.

17. In a cone and tumbler gear variable speed system, a frame, a tumbler shaft, a slide piece on the frame, a tumbler pivoted concentrically relative to the tumbler shaft, and adapted to be moved along said shaft by means of said sliding piece, a series of abutments for the tumbler, and means for 19. In a cone and tumbler-.variable speed y gear system, a frame, a tumbler lever fulcrumed therein, means for rocking and sliding the tumbler, and means for clamping the tumbler lever against the frame in positions of gear intermesh, substantially as described.' A

In testimony whereof, I have hereunto set my hand.

ADOLPH L. DE LEEUW.

Witnesses:

OLIVER B. KAISER, LEO ODONNELL. 

